Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30d4f1334816378…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 15:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65d135d75bbc96ca06f77a10b992fcf SHA-1: 34dba4ef45a01d10ba0f6a2daae12ea2987c99b3 SHA-256: f30d4f1334816378f9ca92538276867085fe6093ca3f60f0c315bb71bafd8d81
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=gravity+form+shortcode+in+template', suggesting a lure related to form shortcodes. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=gravity+form+shortcode+in+template
    • http://files.tarjetaverde.net/uploads/1/3/1/0/131070722/dovufegawaxi-zawirot-nokugek-movesuk.pdf
    • http://files.juiceboxventures.com/uploads/1/3/1/6/131637853/juvifexefodupar.pdf
    • http://sasosag.disneychristmasparty.com/uploads/1/3/1/3/131383483/8154445.pdf
    • http://files.williwisedaycamp.com/uploads/1/3/0/7/130738622/kamiredub-milanibosafasu-runipina-gepigase.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/orb_of_osuvox.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/27968082098.pdf
    • https://cdn.shopify.com/s/files/1/0432/9642/4096/files/givexefulotivivov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/16745410814.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/english_b_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/belajar_coding_html.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/26806711638.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/93025029014.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/polomozexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/vajozexozuwapototikenulaz.pdf
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/78366912955.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006332.bin
812e0dffc9554472cc9c87c41c6c5e707d481cdb1778f5aa1aae12dcc9cf19c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 5588 bytes
font_01_sfnt_off00007618.bin
f9f8aa71d3b2366c0047ea61f4365b757d3fe090aa5839a08c48979938df1d90
pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 10196 bytes